aviv. Now back here at home there have been allegations of a cover up at hillary clinton's state department, internalal memos raising questions whether security officers solicited prostitutes. Jonathan karl has the documents. Take every allegations of misconduct seriously and we investigate them thoroughly. Reporter: The allegations were leaked by a former state department investigate who blamed serious officials for these allegations. A u.S. Ambassador dichd his security detail to solicit sexual favors in a park near the became. The state department concluded the charges were unfounded. The memo sites an investigation that three of hillary clinton's security agents who solicited proous tuts while on official trips, including a march 2010 trip to moss cow and june trip to columbia, two years before the secret service got in trouble for the same thing. The memo says the investigator looked into similar allegations of four other members of hillary clinton's security detail and concluded the problem was indemocratic among security agents. Reporter: The cases were thoroughly investigated and the agents were punished with one or two day suspensions. None were fired because soliciting a prostitute was not considered a fireable offense. The state department insists its pros tugs problem is not indemocratic. Last year alone the detailed company then secretary of state hillary clinton to hotels abroad. I'm not going to speak to specifications. As I said at the on set for obvious reasons but it is hardly indemocratic. Some of the investigations are on going but insist none of them have or will be interfered with. Jonathan karl, abc news, washington.

This transcript has been automatically generated and may not be 100% accurate.

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